1.   There were 8 apples in the refrigerator. Hans and his friends ate 3 of them. Which number sentence best tells how many apples were left?
    A. 3 + 5 = 8 B. 8 − 3 = 5
    C. 5 + 3 = 8 D. 8 − 5 = 3
    Hint

  2.   Which makes this number sentence true, + or −?

8 ___ 5 = 13

    A. B. either + or −
    C. neither + nor − D. +
    Hint

  3.   Which makes this number sentence true, + or −?

23 ___ 5 = 7 + 11

    A. B. either + or −
    C. + D. neither + nor −
    Hint

  4.   Compare. Use <, >, or =

25 + 13 ___ 17 + 21

    A. B. all of these
    C. D. =
    Hint

  5.   Compare. Use <, >, or =

42 − 30 ___ 21 − 10

    A. either > or = B.
    C. = D.
    Hint